Al Gore

Al Gore, 45th vice president of the United States and a controversial public figure, was awarded the Nobel Prize for Peace in 2007 for his efforts to raise awareness about global warming. He has devoted a very large portion of his life to environmental issues, especially in his multiple Academy Award-winning 2006 documentary, "An Inconvenient Truth," his best-selling book of the same name, and through his Repower America campaign. (Source: Britannica Online Encyclopedia / Photo: openDemocracy/flickr)

As Greenpeace turns 40, the eco-movement aches for another wave of innovation

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Al Gore on 'The Colbert Report'

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Al Gore compares climate deniers to racists

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Is Al Gore's Climate Reality Project a new direction or more of the same?

Al Gore announces 24 Hours of Reality to counter misinformation

Al Gore slams President Obama on climate change issues

Al Gore praises Mitt Romney's climate change stance

Gore: Climate deniers are like birthers

New Gore book coming in 2012